scrypter/scrypter.php

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<?php



class SCrypter
{
        private $encryptkey, $td, $iv, $ks, $filterkey;

        function setKey($key)
        {
                srand(1);
                $this->encryptkey = $key;
                $this->td = mcrypt_module_open(MCRYPT_RIJNDAEL_256, '', MCRYPT_MODE_CFB, '');
                $this->iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($this->td), MCRYPT_RAND);
                $this->ks = mcrypt_enc_get_key_size($this->td);
                $this->filterkey = substr(sha1($key), 0, $this->ks);
        }
        function encrypt($data)
        {
                $this->setKey($this->encryptkey);
                mcrypt_generic_init($this->td, $this->filterkey, $this->iv);
                $cipher = mcrypt_generic($this->td, $data);
                mcrypt_generic_deinit($this->td);
                mcrypt_module_close($this->td);
                srand(uniqid());
                return $cipher;
        }
        function decrypt($data)
        {
                $this->setKey($this->encryptkey);
                mcrypt_generic_init($this->td, $this->filterkey, $this->iv);
                $deciphered = mdecrypt_generic($this->td, $data);
                mcrypt_generic_deinit($this->td);
                mcrypt_module_close($this->td);
                srand(uniqid());
                return $deciphered;
        }
}


?>

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